334 



presence of well rounded pebbles of varicolored vein quartz 

 and quartzites, embedded in a matrix of sharp or subangular 

 sand grains and red ferruginous cement, the pebbles ranging 

 in size up to 3 inches in diameter. In addition, occasional 

 grey limestone pebbles occur. Within this formation, 

 as exposed in the Joggins section, siliceous conglomerates 

 are confined to these basal members, but in New Brunswick, 

 conglomerate is, however, as mentioned above, of common 

 occurrence, not only in the lower division, but throughout 

 the formation, in the form of lenticular beds which channel 

 into the underlying grey sandstones or shales. 



The succeeding division is the one especially character- 

 istic of this formation, and consists mainly of greenish grey, 

 yellow or buff weathering sandstones interbedded with 

 brick red argillaceous shales, but with subordinate grey 

 and black carbonaceous shales, as well as thin seams of 

 coal and of fossiliferous bituminous limestone. The latter 

 may carry Leperdiiia-like ostracods, Anihracomya ovalis 

 (Dawson), A. laevis (Dawson), coprolites as well as scales 

 and teeth of Crossopterygian and Chondrostean ganoids. 

 The flora has not yet been worked out in detail, but the 

 commonest forms are drifted trunks of Dadoxylon acadi- 

 anum Dawson, Calamodendron, Stigmaria ficoides Brong- 

 niart, Sigillaria, Calamites and leaves of Cordaites, all of 

 which are also found in the succeeding formation. 



Middle part of section: Lower Cove to McCarren 



Brook. 



The typical sharp quartz sandstone of the formation 

 occurs at Boss point and at an abandoned quarry at Lower 

 cove, where, in the past, the rock from the reefs was ex- 

 tensively worked into grindstones. The frequent occur- 

 rence, however, of hard concretions and of drifted plant 

 material must be a serious defect of this stone. 



Joggins Formation — -The sandstones of the quarry at 

 Lower Cove are succeeded by 2,000 feet (610 m.) of red 

 beds which because of their lithological contrast with the 

 underlying Boss Point measures, and for other reasons, in- 

 dicate the possibility of a disconformity existing beneath 

 this horizon and are therefore classed with the Joggins 

 formation. 



It is thought that the 2,000 feet of red shales may be 

 the equivalent of certain red conglomerate and associated 



